Season 4, Episode 10 Crash Into Me

First Aired: December 7, 2007

Conclusion. Meredith works furiously to save a paramedic trapped in an ambulance; Lexie literally holds the life of a patient (Seth Green) in her hands; Derek must rely on nurse Rose (Lauren Stamile) to save a patient when an OR computer breaks down; and Bailey keeps Tucker (Cress Williams) waiting while she operates on a white supremacist . Ava: Elizabeth Reaser.